<template>
  <div class="login_container">
    <div  class="login_box" >
<!--      头像区域-->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="">

      </div>
<!--      登录表单区-->
      <el-form ref="loginFormRef" class="login_form" :rules="loginFormRules"  :model="loginForm"  label-width="0px">
<!--        用户名-->
        <el-form-item prop="username">
          <el-input  v-model="loginForm.username" prefix-icon="iconfont icon-username" ></el-input>
        </el-form-item>
        <!--        密码-->
        <el-form-item prop="password">
          <el-input  v-model="loginForm.password" type="passWord" prefix-icon="iconfont icon-mima" ></el-input>
        </el-form-item>
        <!--        按钮区域-->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 这是登录表单的数据绑定对象
      loginForm: {
        username: 'admin',
        password: '123456'

      },
      // 表单的验证规则
      loginFormRules: {
        // 验证用户名
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' }
        ],
        // 验证密码
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 12, message: '长度在 6 到 12 个字符', trigger: 'blur' }
        ]

      }
    }
  },

  methods: {
    resetLoginForm () {
      this.$refs.loginFormRef.resetFields()
    },
    login () {
      this.$refs.loginFormRef.validate(async (valid) => {
        if (valid) {
          const { data: result } = await this.$http.post('login', this.loginForm)
          if (result.meta.status !== 200) {
            return this.$message.error('登录失败')
          } else {
            this.$message.success('登录成功')
            // 1保存token
            window.sessionStorage.setItem('token', result.data.token)
            //  2通过编程式导航跳转到后台主页。路由地址、/home
            this.$router.push('/home')
          }
        }
      })
    }
  }
}
</script>

<style scoped>

  .login_container{

    background-color: #2b4b6b;
    height: 100%;
  }

  .login_box{
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
  }

  .avatar_box{
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    box-shadow: 0 0 10px #ddd;
    padding: 10px;
    position: absolute;
    background-color: white;
    left: 50%;
    transform: translate(-50%,-50%);
  }

  .avatar_box img{
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: #eee;
  }

  .login_form{
    position: absolute;
    bottom: 0;
    padding: 0 20px;
    box-sizing: border-box;
    width: 100%;
  }
  .btns{
    display: flex;
    justify-content: flex-end;
  }

</style>
